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New Braunfels · Comal County

Foundation repair Gruene.

Gruene sits on thin Edwards limestone uplands where the Balcones Escarpment cuts through New Braunfels, just above the river-terrace clay of the Guadalupe. GroundLock reads which ground your slab is on before driving a single steel pier.

Part of New Braunfels51+ slabs nearbyLifetime warranty

How a Gruene repair actually unfolds

01

Read the ground, then the slab

Before anything else we figure out whether your home sits on the thin caliche-over-limestone uplands of the historic district or on the deeper alluvial clay sloping toward the Guadalupe, because the two demand different pier depths.

02

Free elevation survey to 1/64 inch

A local inspector maps your slab to +/-0.01 in. and draws the real deflection contour, so the plan targets where the floor has dropped rather than where a crack happened to surface.

03

Drive galvanized steel piers to refusal

Piers are advanced hydraulically until they hit load-bearing strata below the active clay zone, verified by the pressure curve at the moment of installation.

04

Lift, transfer load, and protect the fix

We raise the slab toward level, shift its weight off the moving soil and onto steel, then address grading or drainage so water stops feeding the next round of movement.

Two soils, half a mile apart

The historic blocks around Texas's oldest dance hall sit high on Edwards limestone, where residual clay and caliche may run only a foot or two deep before hitting fractured bedrock. That makes the active zone shallow but intense: even a thin clay horizon with a plasticity index in the 40 to 60 range can rack a doorframe out of square when a Central Texas drought desiccates the edge and pulls support out from under the slab perimeter.

Drop down toward the Guadalupe and Comal river terraces and the picture inverts. Alluvial clays there run many feet deep and behave a lot like the Blackland Prairie's Houston Black series, with seasonal volume change that keeps the active zone working 10 to 15 feet below grade. A home on the floodplain side of Gruene and a home up on the rock are, in engineering terms, two different foundation problems wearing the same cracked drywall.

Shallow pressed-concrete cylinders that stop within either active zone are just borrowing capacity from soil that will move again next season. Our steel piers are driven past that zone to ground the weather can't reach, which is why the repair holds through both the dry years and the wet ones.

The free survey isn't a sales call

You get a measured elevation contour and a written, engineer-backed plan with pier count, depths, and lift sequence spelled out before any price. Whether you hire us is entirely your call.

Most Gruene homes stay occupied during the work, typical projects land between $4,500 and $14,000, financing is available, and the warranty is lifetime and transferable to the next owner.

Signs worth a closer look in a Gruene home

Minor seasonal movement is normal on Comal County soil; these are the patterns that usually mean the slab is losing support:

  • Stair-step cracks marching diagonally through exterior brick or stone veneer
  • Doors and windows that drag, won't latch, or have visibly racked out of square
  • Drywall cracks fanning out from the upper corners of door and window openings
  • Floors that slope toward one side of the house or feel bouncy underfoot
  • Gaps opening where walls meet trim, cabinets, or the ceiling line
  • Separation at the garage slab or fresh cracks across an interior floor

Questions Gruene homeowners ask us

My house is up on the limestone near the dance hall, not down by the river. Do I even have a clay problem?
You can. The upland soil is thin, but the foot or two of residual clay over the bedrock still shrinks and swells, and because it's shallow the movement concentrates right at the slab edge. We've seen upland homes with edge settlement as clear as anything down on the river terrace.
Why would two houses on the same street move so differently?
Because the Balcones Escarpment runs through New Braunfels, lots that look identical can sit on completely different ground, one on rocky limestone and the neighbor on deep alluvial clay. That's why we identify your geologic zone first instead of handing out one cookie-cutter pier depth.
Will the live oaks in my yard make this worse?
On the river-clay side, often yes. Mature live oaks and cedar elms pull huge volumes of moisture from deep clay in summer and create a desiccation cone that can reach 20 feet or more from the trunk, sometimes well under a corner of the slab. We factor tree position into the plan.
How deep do your piers actually go here?
As deep as it takes to reach refusal in load-bearing strata below the active zone. On the limestone uplands that can be relatively shallow to competent rock; on the river terraces the active zone commonly runs 10 to 15 feet, so the piers go past it. The survey and soil tell us, not a fixed number.
Should I be watering my foundation during a drought?
On the clay-heavy side, yes. Run a soaker hose about 12 to 18 inches out from the slab, evenly around the house, so the soil doesn't shrink away and drop a corner. Steady and consistent beats a heavy soak once in a while.
Do you fix the cause or just jack the house back up?
Both, where it makes sense. We stabilize on piers and then tackle the water side, since the standard six inches of fall over the first ten feet of grading and drainage keeps moisture from pooling against the stem wall. Lifting without managing the water just resets the clock.
Once it's repaired, can it move again?
The piered sections ride on steel below the active soil, so they shouldn't follow the seasons anymore, and that's what the lifetime transferable warranty covers. Areas that weren't piered can still shift, which is the other reason we deal with drainage at the same time.
Schedule

Book your free
foundation inspection.

Tell us where you are and what you’re seeing. A GroundLock structural advisor confirms within one business hour.

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Get your free foundation inspection.

A licensed inspector measures your slab elevation to ±0.01 in. (1/64 in.) and gives you a written, engineer-backed plan with zero pressure.

Book my inspectionCall (210) 728-6205